1. <?php
  3. /**
  4. * Function to add timestamp metadata to a given data item.
  5. *
  6. * @param mixed $data The data item to add metadata to. Can be anything.
  7. * @param string $key The key for the timestamp metadata (e.g., 'created_at', 'modified_at').
  8. * @return mixed The data item with the added timestamp metadata.
  9. */
  10. function addTimestampMetadata($data, $key = 'created_at') {
  11. // Get the current timestamp.
  12. $timestamp = time();
  14. // Add the timestamp metadata to the data item.
  15. if (is_array($data)) {
  16. $data[$key] = $timestamp;
  17. } else {
  18. $data = [$key => $timestamp]; // Wrap in array if not already
  19. }
  21. return $data;
  22. }
  24. /**
  25. * Function to update the timestamp metadata of a data item.
  26. *
  27. * @param mixed $data The data item to update.
  28. * @param string $key The key for the timestamp metadata.
  29. * @return mixed The data item with updated timestamp metadata.
  30. */
  31. function updateTimestampMetadata($data, $key = 'modified_at') {
  32. $timestamp = time();
  34. if (is_array($data)) {
  35. $data[$key] = $timestamp;
  36. } else {
  37. $data = [$key => $timestamp];
  38. }
  39. return $data;
  40. }
  43. // Example Usage:
  44. $my_data = "This is some data.";
  45. $data_with_timestamp = addTimestampMetadata($my_data, 'created_at');
  46. echo "Created at: " . $data_with_timestamp['created_at'] . "\n";
  48. $array_data = ['name' => 'Example', 'value' => 123];
  49. $array_data_with_timestamp = addTimestampMetadata($array_data, 'created_at');
  50. print_r($array_data_with_timestamp);
  52. $updated_data = updateTimestampMetadata($array_data_with_timestamp, 'modified_at');
  53. print_r($updated_data);
  54. ?>

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